为开发减震性能良好的新型阻尼器，将颗粒阻尼器与多重调谐质量阻尼器（multiple tuned mass dampers, MTMD）相结合，提出一种新型的多重调谐冲击阻尼器（multiple tuned impact dampers, MTID），并对其减震性能进行了优化和对比研究。首先，提出MTID应用于实际工程结构时基于性能的多目标优化设计方法及流程；然后，基于一个20层Benchmark结构，进一步分析了传统设计和优化设计MTID的振动控制性能；最后，对比研究了MTID和MTMD的最优减震性能及工作行程。研究表明，MTID需要一定的启动时间以高效发挥减震性能，待其启动后，可显著减小主体结构的动力响应；优化设计的MTID相比于传统设计具有更优异的减震性能，进而可显著减小主体结构在大震作用下的塑性变形和非线性损伤；MTID和MTMD的最优减震性能较为接近，但MTID的工作行程更小。
Abstract
To develop dampers with good damping performance, a new type of multiple tuned impact dampers (MTID) was proposed by combining particle damper with multiple tuned mass dampers (MTMD), and its damping performance was optimized and analyzed. Firstly, the performance-based multi-objective optimization design method and process were proposed when MTID is applied to practical engineering structures. Then, based on a 20-story benchmark structure, the vibration control performance of the traditional design and optimized design MTID was analyzed. The optimal damping performance and working stroke of MTID and MTMD are also compared. The results show that it takes a certain start-up time for MTID to play its damping performance effectively, and the dynamic response of the main structure can be significantly reduced after MTID is started. The optimized MTID has better damping performance than the traditional design, and then significantly reduce the plastic deformation and nonlinear damage of the main structure under a major earthquake. Furthermore, the optimal damping performance of MTID and MTMD are relatively close, but the working stroke of MTID is smaller.
关键词
颗粒阻尼器 /
多重调谐冲击阻尼器 /
多目标优化 /
减震性能
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Key words
particle damper /
multiple tuned impact dampers /
multi-objective optimization /
damping performance
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